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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* Fluent Bit
* ==========
* Copyright (C) 2015-2022 The Fluent Bit Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <fluent-bit/flb_input_plugin.h>
#include <fluent-bit/flb_config.h>
#include <fluent-bit/flb_error.h>
#include <fluent-bit/flb_pack.h>
#include <fluent-bit/flb_random.h>
#include <fluent-bit/flb_log_event_encoder.h>
#include <msgpack.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#define DEFAULT_INTERVAL_SEC "1"
#define DEFAULT_INTERVAL_NSEC "0"
struct flb_in_random_config {
/* Config properties */
int interval_sec;
int interval_nsec;
int samples;
/* Internal */
int samples_count;
int coll_fd;
struct flb_input_instance *ins;
struct flb_log_event_encoder *log_encoder;
};
/* cb_collect callback */
static int in_random_collect(struct flb_input_instance *ins,
struct flb_config *config, void *in_context)
{
int ret;
uint64_t val;
struct flb_in_random_config *ctx = in_context;
if (ctx->samples == 0) {
return -1;
}
if (ctx->samples > 0 && (ctx->samples_count >= ctx->samples)) {
return -1;
}
if (flb_random_bytes((unsigned char *) &val, sizeof(uint64_t))) {
val = time(NULL);
}
ret = flb_log_event_encoder_begin_record(ctx->log_encoder);
if (ret == FLB_EVENT_ENCODER_SUCCESS) {
ret = flb_log_event_encoder_set_current_timestamp(ctx->log_encoder);
}
if (ret == FLB_EVENT_ENCODER_SUCCESS) {
ret = flb_log_event_encoder_append_body_values(
ctx->log_encoder,
FLB_LOG_EVENT_CSTRING_VALUE("rand_value"),
FLB_LOG_EVENT_UINT64_VALUE(val));
}
if (ret == FLB_EVENT_ENCODER_SUCCESS) {
ret = flb_log_event_encoder_commit_record(ctx->log_encoder);
}
if (ret == FLB_EVENT_ENCODER_SUCCESS) {
flb_input_log_append(ctx->ins, NULL, 0,
ctx->log_encoder->output_buffer,
ctx->log_encoder->output_length);
ret = 0;
}
else {
flb_plg_error(ctx->ins, "log event encoding error : %d", ret);
ret = -1;
}
flb_log_event_encoder_reset(ctx->log_encoder);
ctx->samples_count++;
return 0;
}
/* Set plugin configuration */
static int in_random_config_read(struct flb_in_random_config *ctx,
struct flb_input_instance *in)
{
int ret;
/* Load the config map */
ret = flb_input_config_map_set(in, (void *)ctx);
if (ret == -1) {
return -1;
}
/* interval settings */
if (ctx->interval_sec <= 0 && ctx->interval_nsec <= 0) {
/* Illegal settings. Override them. */
ctx->interval_sec = atoi(DEFAULT_INTERVAL_SEC);
ctx->interval_nsec = atoi(DEFAULT_INTERVAL_NSEC);
}
flb_plg_debug(ctx->ins, "interval_sec=%d interval_nsec=%d",
ctx->interval_sec, ctx->interval_nsec);
return 0;
}
/* Initialize plugin */
static int in_random_init(struct flb_input_instance *in,
struct flb_config *config, void *data)
{
int ret = -1;
struct flb_in_random_config *ctx = NULL;
/* Allocate space for the configuration */
ctx = flb_calloc(1, sizeof(struct flb_in_random_config));
if (!ctx) {
return -1;
}
ctx->samples_count = 0;
ctx->ins = in;
ctx->log_encoder = flb_log_event_encoder_create(FLB_LOG_EVENT_FORMAT_DEFAULT);
if (ctx->log_encoder == NULL) {
flb_plg_error(in, "could not initialize event encoder");
flb_free(ctx);
return -1;
}
/* Initialize head config */
ret = in_random_config_read(ctx, in);
if (ret < 0) {
flb_free(ctx);
return -1;
}
flb_input_set_context(in, ctx);
ret = flb_input_set_collector_time(in,
in_random_collect,
ctx->interval_sec,
ctx->interval_nsec, config);
if (ret < 0) {
flb_plg_error(ctx->ins, "could not set collector for head input plugin");
flb_free(ctx);
return -1;
}
ctx->coll_fd = ret;
return 0;
}
static void in_random_pause(void *data, struct flb_config *config)
{
struct flb_in_random_config *ctx = data;
flb_input_collector_pause(ctx->coll_fd, ctx->ins);
}
static void in_random_resume(void *data, struct flb_config *config)
{
struct flb_in_random_config *ctx = data;
flb_input_collector_resume(ctx->coll_fd, ctx->ins);
}
static int in_random_exit(void *data, struct flb_config *config)
{
struct flb_in_random_config *ctx = data;
(void) *config;
if (!ctx) {
return 0;
}
if (ctx->log_encoder != NULL) {
flb_log_event_encoder_destroy(ctx->log_encoder);
}
flb_free(ctx);
return 0;
}
static struct flb_config_map config_map[] = {
// samples
// interval_sec
// interval_nsec
{
FLB_CONFIG_MAP_INT, "samples", "-1",
0, FLB_TRUE, offsetof(struct flb_in_random_config, samples),
"Number of samples to send, -1 for infinite"
},
{
FLB_CONFIG_MAP_INT, "interval_sec", DEFAULT_INTERVAL_SEC,
0, FLB_TRUE, offsetof(struct flb_in_random_config, interval_sec),
"Set the collector interval"
},
{
FLB_CONFIG_MAP_INT, "interval_nsec", DEFAULT_INTERVAL_NSEC,
0, FLB_TRUE, offsetof(struct flb_in_random_config, interval_nsec),
"Set the collector interval (sub seconds)"
},
/* EOF */
{0}
};
struct flb_input_plugin in_random_plugin = {
.name = "random",
.description = "Random",
.cb_init = in_random_init,
.cb_pre_run = NULL,
.cb_collect = in_random_collect,
.cb_flush_buf = NULL,
.cb_pause = in_random_pause,
.cb_resume = in_random_resume,
.cb_exit = in_random_exit,
.config_map = config_map
};
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